FR3040602A1 - - Google Patents

Abstract

The invention relates to a container for a cosmetic product for storing a cosmetic product having a viscosity in the range of 2000 cps to 60,000 cps. The container comprises a container body for storing the cosmetic product and an inner lid having a frame to be attached to an opening of the container body and covered with an elastic fibrous sheet. The fibrous sheet, when attached to the frame in the static state, has a visible light transmittance of 1.8% or less, and when the fibrous sheet is stretched from the static state to have a 1.05 times larger area than the static state, the transmittance of the visible light of the fibrous sheet becomes greater than or equal to 2.0%.

Description

COSMETIC PRODUCT CONTAINER, INTERIOR COVER WITH FIBROUS SHEET, AND METHOD FOR MANUFACTURING THE INSIDE COVER

CROSS REFERENCE TO PARENTAL REQUESTS

The present application claims the priority of Japanese Patent Application No. 2015-175493, filed on September 7, 2015, which is incorporated herein by reference. BACKGROUND Technical field

The present invention relates to a container for a cosmetic product capable of storing a cosmetic product having a fluidity and a viscosity, an inner cover to be used with the container for a cosmetic product, and a method of manufacturing the inner cover.

Related Art

There are cosmetic products having various physical properties from a solid to liquid state, and various types of cosmetic containers have been developed to store these cosmetics according to their physical properties.

Liquid cosmetic products having a very high fluidity are stored in bottles, the creamy cosmetic products having a relatively low viscosity and a certain fluidity are stored in tubes, and the solid or powdery cosmetic products having a high viscosity and being devoid of any fluidity is usually stored in compact containers.

Cosmetic products with relatively low viscosity and fluidity have been widely used recently, but most of these cosmetics are stored in mirrorless tubes. When using a facial cosmetic product stored in a tube, however, one needs a mirror. This is why the cosmetic tube product is difficult to use compared to cosmetics stored in compact containers with a mirror.

The published Japanese Patent Application Publication No. 2008-194190 and the Japanese Utility Model Application Publication No. 7-43575 disclose containers for cosmetic products in which a cosmetic product in the form of paste or powder , fluid-free, is stored in a container body and a circular cover covered with a mesh is placed at the upper open end of the container body. In these containers for cosmetic products, a bellows is used to push the mesh down against the mesh tension from above to take the cosmetic product in the body of the container through the mesh.

However, since a ratio of open spaces of the mesh is high, constituting approximately 40% to 60% of the total mesh area, when a cosmetic product of low viscosity and having a certain fluidity is present in the container body covered by the lid and held with the lid of the cosmetic container, which is upside down for a long time, the cosmetic product will eventually pass through the mesh and escape to the outside, so it can not be used to store such cosmetics.

ABSTRACT

One aspect of the present invention is to provide a cosmetic container for storing a cosmetic product having a low viscosity but a certain fluidity in a container body with an open top end without leaking the cosmetic product from within the container. container body, even when the container body is held upside down for a long time, and the cosmetic product can be easily removed from the container body using a bellows if necessary.

In one aspect of the present invention, a cosmetic product having a low viscosity but a certain fluidity, mentioned herein, is a cosmetic product having a viscosity in the range of 2000cP to 60,000cP. However, a preferable range of viscosity for the cosmetic product to be stored in the present cosmetic container is 2000cP to 30,000cP. A cosmetic container according to the present invention comprises a container body for storing the cosmetic product having low viscosity and fluidity and an inner cover having a frame to be attached to an opening of the container body and covered with a fibrous sheet elastic. The fibrous sheet, when attached to the frame in the static state, has a visible light transmittance of 1.8% or less and when the fibrous sheet is stretched from the static state to have an area 1.05 times greater than that of the static state, the transmittance of the visible light of the fibrous sheet becomes greater than or equal to 2.0%.

The fibrous sheet is preferably formed from braided fibers and more preferably the fibrous sheet is formed from warp knitting.

In addition, the main fiber of the fibrous sheet is preferably polyester or nylon, and its sub-fiber is polyurethane. With regard to the mixing ratio of the main fiber, in the case where the polyester is used as the main fiber, the polyester is preferably included at a level greater than or equal to 85%, and in the case where the nylon is used as main fiber, the nylon is preferably included at a rate greater than or equal to 87%.

BRIEF DESCRIPTION OF THE DRAWINGS

For a more complete understanding of the present invention and its advantages, a reference will be made to the following description, together with the accompanying drawings, in which: Figure 1 is an exploded perspective view of a product container cosmetic according to one embodiment of the present invention; Fig. 2A is a perspective view showing a partially assembled state of the cosmetic container according to the embodiment above, Fig. 2B is a perspective view showing the entire cosmetic container in an assembled state, and Fig. 2C is a vertical cross-sectional view of Figure 2B; Fig. 3 is a diagram showing a device for measuring transmittance of visible light of a fibrous sheet of the above embodiment; Fig. 4A is a vertical cross-sectional view showing the fibrous sheet attached to a bottom surface of a frame, and Fig. 4B is a cross-sectional view showing a state where a tension is applied to a central portion of the fibrous sheet. in the direction of the intersection of a surface thereof; and Fig. 5 is a schematic view showing molds for injection molding of the inner cover.

DESCRIPTION OF EXAMPLES OF EMBODIMENTS

A cosmetic container 1 according to an embodiment of the present invention comprises, as shown in FIG. 1, a container body 4 open in an upper end thereof, an outer lid 2 which hermetically seals an opening of the body of container 4, and an inner lid 3 to be fixed inside the container body 4. The container body 4 is configured from a shallow pot-shaped portion 41 to store a cosmetic product and a cylindrical neck portion 42 which extends upwardly from the pot-shaped portion 41. An outer thread 43 is formed on an outer periphery of the neck portion 42 and an inner peripheral surface 44 of the shaped portion. pot takes a cylindrical form. An internal thread which is screwed on the outer thread 43 is formed on an inner peripheral surface of the outer cover 2 (see Fig. 2C), and a mirror 20 is attached to an inner lower surface of the outer cover 2. The inner cover 3 has a shallow cylindrical frame 31 with an outer peripheral surface 32 which contacts the inner peripheral surface 44 of the container body 4, and an elastic fibrous sheet 10 is attached to the lower end 35 of the frame 31 to cover the cylindrical frame 3. An upper end of the frame 31 is provided with an outwardly extending flange 33. As shown in Fig. 2C, when the inner lid 3 is secured within the container body 4, the bottom surface the rim 33 of the frame 31 comes into contact with an upper end face of the container body 4. In this way, the inner cover 3 does not fall into the interior. r of the container body 4. By fixing the inner lid 3 to the container body 4 and sealing the container body 4 with the outer lid 2, the cosmetic container 1 having the external appearance shown in Fig. 2B is got.

In this embodiment, the fibrous sheet 10 is attached at an upper end surface thereof to the lower end 35 of the frame 31, as shown in FIG. 2C. A lower surface of this fibrous sheet 10 is arranged to be spaced upwardly with respect to a surface of the inner bottom 45 of the container body 4 with a space D1, said space DI becoming substantially a storage space of a product cosmetic 5. The cosmetic product 5 initially stored in the container body 4 should be present in such an amount that the cosmetic product does not come into contact with the lower surface of the fibrous sheet 10, in particular so that a slight The gap is formed below the fibrous sheet 10. It should be noted that in the embodiment illustrated in FIG. 2C, the depth in the vertical direction of the frame 31 of the inner cover 3 is formed to be slightly larger than the mid height of the container body, and the upper side of the fibrous sheet 10 inside the frame 31 is constituted in the form of a space for storing a bellows (not shown)

The fibrous sheet 10 of the inner cover 3 is preferably formed by knitting 500 denier or less fiber warp yarns, and the openings formed by the knitting of warp yarns are so small that they can not be visually observed. . The degree of the openings can be measured with a transmittance of visible light to be described later. The fibrous sheet is preferably formed from a knitted warp knit fabric having excellent elasticity and flexibility. As fibers for sheet 10, a polyester or nylon is preferably used as the main fiber and a polyurethane is used as a subfiber.

In one embodiment of the present invention, when the cosmetic product having a low viscosity and fluidity is stored in the container body 4 and closed with the inner lid at the upper end thereof, it is necessary, even when the stored cosmetic product is held for a long time with the container body upside down, the fibrous sheet 10 prevents the cosmetic product from leaking through the fibrous sheet 10. Moreover, when the cosmetic container is held in a normal state as shown in Figure 2 (C) and a central portion of the fibrous sheet 10 is pressed down for a predetermined time with a bellows for example, the openings between the fibers of the sheet 10 widen, and the cosmetic product that is stored inside the container body can seep up through the openings of the fibrous sheet and adhere to the bellow if bi in that the cosmetic product can be easily removed.

Then, according to the invention, changes in the width of the openings between the fibers of the sheet 10 due to the elasticity of the sheet are aimed at, and an appropriate degree of openings and changes thereof are measured with the transmittance of visible light.

Figure 3 shows a device for measuring the transmittance of visible light through the fibrous sheet. Initially, a sample fibrous sheet 111 having elasticity is mounted on a measuring frame 110, which corresponds to the frame 31 of the inner cover 3, with a predetermined tension designated hereinafter. The measuring device 100 has a light source portion 101 and a measurement portion 102, and the fibrous sheet 111 which is mounted on the measuring frame 110 as above is placed between the light source portion 101 and the measurement portion 102. light from the light source portion passes through the fibrous sheet and is received by a photoreceptor element integrated in the measurement portion 102. The intensity of the light through the fibrous sheet measured by the photoreceptor portion is compared with an initial intensity of the light measured without the fibrous sheet and therefore a transmittance of the visible light is calculated from it and the measurement part 102 transmits and displays the results of the calculation above. For the measurement of visible light transmittance, a known device ("HA-TR" manufactured by Suga Test Instruments Co. Ltd. in Japan) on the market is used.

As shown in FIG. 3B, the width w at the periphery of the measuring frame 110 is enlarged to facilitate fixation of the fibrous sheet. An inside diameter 02 of the measuring frame 110 is 7 cm. Here, a sample 111 of the fibrous sheet is cut into a circular shape so that it is slightly larger than the inside diameter 02 of the frame. The previous state of the sample sheet, which is circular and unexpanded, is referred to herein as the "initial state" of the fibrous sheet and has an area (S0). Then, the peripheral edge of the sample sheet 111 is adhered to an end face of the measuring frame 110 at a predetermined low voltage so that the sample sheet does not become soft. The above predetermined voltage is a voltage that expands an area of the sample sheet 1.05 times from the initial state and this expanded state is referred to as the "static state" of the fibrous sheet. Fig. 4A shows the static state fibrous sheet adhered to the lower end of the frame 31 having a diameter <z> 1.

Fig. 4B is a view showing the fibrous sheet 10 pressed down at the central portion thereof towards the cosmetic product in the container body. As shown in FIG. 4A, the sheet 10 is a circle having a diameter 0i (= 7 cm) in the static state and the area is π (0i / 2) 2 (denoted hereinafter Si) of the circle of On the other hand, as shown in Figure 4B, when the central portion of the sheet 10 is pressed to a determined depth D2, the sheet 10 is deformed to take the shape of a cone. Thus, the flat area (Si) of the sheet 10 is transformed into a lateral surface area of this cone (hereinafter referred to as S2), calculated as follows. (S2) = π · (0i / 2) 2 · {(0i / 2) 2 + D22} 1/2

In the calculation, when the fibrous sheet 10 in the static state which has an area Si (= 1) is pressed, as shown in FIG. 4 (B), so that the depth D2 of the fibrous sheet is changed to 1 cm, S2 / Si area ratios before and after the pressure increase to 1.05. Therefore, when measuring the transmittance of visible light using the above device to reproduce the voltage when the fibrous sheet 10 of the inner lid 3 of the cosmetic container is pressed to the depth D2 = 1 cm, the Fibrous sample sheet in the initial state should expand to an area of 1.05 χ 1.05 = 1.10 times. Notably, the initial sample fibrous sheet should be stretched 1.05 times to the static state and then the same static state sample fibrous sheet should be further stretched 1.05 times to reproduce the condition. depressed illustrated in Figure 4 (B). Thus, the sample fibrous sheet stretched 1.10 times from the initial state is attached to the measuring frame.

According to the invention, nine different types of fibrous sheets (I-IX) are selected and three types of tests have been carried out on these fibrous sheets so as to evaluate a leakage of the cosmetic product through the fibrous sheet, a facility of extraction of the cosmetic product through the fibrous sheet, and degradation of the fibrous sheet. The leak test is performed to find out whether the cosmetic product stored in the container body can leak when the container body is held upside down. In this test, each type of the nine fibrous sheets is attached to a frame with a static state voltage discussed above and the transmittance of the visual light of each fibrous sheet was measured first.

Then, a cosmetic product that has a relatively low viscosity of 2000 cP was placed on each fibrous sheet for 24 hours and the leakage of the cosmetic product through each fibrous sheet was visually inspected. It has been evaluated that a fibrous sheet devoid of any trace of leakage was satisfactory.

As for the ease of extraction test, each type of the nine fibrous sheets is stretched from the static state to have an area 1.05 times greater than that of the static state and the transmittance of the visual light of each fibrous leaf was measured. Then, each fibrous sheet is attached to an open end of a container body filled with a cosmetic product having a relatively low viscosity of 60,000 cps and the fibrous sheet has been repeatedly depressed using the bellows against the cosmetic product. At the moment when the cosmetic product in the container body stops oozing to the upper surface of the fibrous sheet, a remaining amount of cosmetic product is measured. When the remaining quantity is less than or equal to 10% of the initial quantity, it has been found to be satisfactory.

Another degradation test is an attempt to find out whether or not the fibrous sheet becomes flaccid or soft after a while, and this is a fiber problem itself which is considered to be dependent on the amount of polyurethane. Although the polyurethane is mixed with other fibers to enhance the elasticity of the fibrous sheet, it is known that when a certain amount of polyurethane comes into contact with the cosmetic product, its elasticity is degraded and the surface of the fibrous leaf becomes flaccid or soft. This wave will not affect the leakage of the cosmetic product and the ease of extraction of the cosmetic product, but will degrade the appearance of the cosmetic product to be used. Therefore, the surface conditions of the polyurethane-containing fibrous sheets were observed and the fibrous sheets not generating waves or depressions after the repeated ease of extraction test were considered acceptable.

The results are shown in the table below._

As shown in the table above, in testing whether the cosmetic product in the container body leaks when the container body is held upside down, samples V, VIII and IX having visible light transmittances in the initial state of 2.2, 3.1 and 44.0, respectively, exhibited leakage.

Other samples that had a visible light transmittance of 1.8 or less showed no leakage. In view of the above results, it has been noted that the transmittance of the visible light in the initial state of the fibers of the sheet less than or equal to 1.8 will be satisfactory. In the other test of ease of extraction of the cosmetic product through the fibrous sheet, only the sample VI, in which the transmittance of the visual light of the static state x 1.05 is equal to 1.09, a presented an unsatisfactory result. From this result, it could be noted that the transmittance of visible light greater than or equal to 2.0 will be satisfactory for fibrous sheets that have been stretched 1.05 times from the static state.

It could also be noted that the usual mesh of sample IX used on the inner cover showed the light transmittance of 44.0 in the static state, said value being by far the highest of all the samples, and that the mesh could not be used on the inner lid of the cosmetic container having a low viscosity and fluidity.

In view of the above results, it could be noted that the fibrous sheet, once attached to the frame in the static state, should have a visible light transmittance of 1.8% or less, and when the sheet fibrous is stretched from the static state to have an area 1.05 times greater than that of the static state, the transmittance of visible light should be greater than or equal to 2.0%. From the degradation test of the fibrous sheets, it was noted that when the amount of polyurethane contained in the fibrous sheet exceeded 20%, the degradation occurred, but such degradation did not occur if the amount of it was 15%.

Finally, it has been noted that, in the case where the polyester is used as the main fiber, the polyester is preferably included at a level greater than or equal to 85%, and in the case where the nylon is used as the main fiber, Nylon is included at a rate greater than or equal to 87%.

In the above embodiment of the present invention, there is disclosed a container for a cosmetic product whose container body is opened and closed by screwing the outer cover from the top of the container body, but this invention is not limited to the above container and can be applied to typical compact containers in which a hinge is used to open and close a container body by a lid.

Reference will now be made to a method of manufacturing the inner cover with respect to Fig. 5 which shows a mold in vertical cross-section to form the inner cover, Fig. 5A showing the mold 50 in an open state, and Fig. 5B showing the mold 50 in a closed state.

As shown in FIG. 5A, the mold 50 is configured from a first mold 51 which is fixed in the lowest position, with a second mold 52 disposed above the first mold 51 to be lifted and lowered, and a third mold 53 disposed above the second mold 52 to be raised and lowered. The second mold 52 is provided with a cylindrical cavity 55 which runs through the outer shape of a frame. The third mold 53 is fixed by a core 56 to form a hollow part of the frame. In this example, a fibrous sheet 111 is provided with a predetermined tension between the first mold 51 and the second mold 52. The predetermined tension described above is a tension to produce the static state of the fibrous sheet when it is molded on the frame.

As shown in Fig. 5B, when the mold 50 is closed, the core 56 is inserted into the cylindrical cavity 55 in the second mold 52 as shown in Fig. 5A and a hollow cylindrical cavity 60 in the form of the frame having a gap. flange 61 to an upper end is formed. In addition, the fibrous sheet 111 is sandwiched between an upper end face 57 of the first mold 51 and a lower end face 58 of the core 56. Also, a channel for feeding a molten resin from a pad until a door 62 is formed.

When the molten resin is injected via the gate 62 into the cavity 60, the molten resin under pressure oozes through the fibrous sheet 111 disposed on the lower end of the cavity 60 and blocks with the resin in the cavity. Thus, when the resin cools, the resin cures in an integral frame form with the fibrous sheet 111. Then, the mold 50 is opened for separation of the gate 62 and the fibrous sheet 111 is cut along the the outer shape of the circular lower end of the frame to complete the inner cover 3 in FIG.

Claims (8)

A cosmetic container comprising: a container body for storing a cosmetic product having a viscosity in a range of 2000cP to 60,000cP; and an inner cover having a frame to be attached to an opening of the container body and covered with an elastic fibrous sheet; wherein the fibrous sheet, when attached to the frame in the static state, has a visible light transmittance of 1.8% or less, and when the fibrous sheet is stretched from the static state to having an area 1.05 times greater than that of the static state, the transmittance of the visible light of the fibrous sheet becomes greater than or equal to 2.0%. Cosmetic container according to claim 1, wherein the fibrous sheet is formed from braided fibers. The cosmetic container according to claim 2, wherein the fibrous sheet is formed from the knitting of warp yarns. Cosmetic container according to claim 2 or 3, wherein a main fiber of the fibrous sheet is made of polyester or nylon, and a sub-fiber is made of polyurethane. Cosmetic container according to claim 4, wherein, in the case where the polyester is used as the main fiber, the polyester is included at a level greater than or equal to 85%. Cosmetic container according to claim 4, wherein, in the case where the nylon is used as the main fiber, the nylon is included at a level greater than or equal to 87%. An inner lid for a container body for storing a cosmetic product, the inner lid having a frame to be attached to an opening of the container body; the fibrous sheet, when attached to the frame in the static state, having a transmittance of visible light of less than or equal to 1.8%; and when the fibrous sheet is stretched from the static state to have an area 1.05 times greater than that of the static state, the transmittance of the visible light of the fibrous sheet becoming greater than or equal to 2, 0%. A method of manufacturing an inner lid for a cosmetic container, comprising: selecting a flexible fibrous sheet that has a visible light transmittance of 1.8% or less in a static state of the sheet fibrous, where the fibrous sheet has been stretched from an initial state of the fibrous sheet to have an area (Si) 1.05 times larger than an area (So) in an initial state, said fibrous sheet also having a visible light transmittance greater than or equal to 2.0% when the fibrous sheet is further stretched from the static state to have an area of 1.05 * Si; stretching the fibrous sheet from the S0 area to the Si area; and adhering a peripheral end surface of the fibrous sheet, which is held in the stretched static state, to an end surface of a frame.